code: def visit_Assign(self, node):
      if node in self.nodes:
          to_prune = self.nodes[node]
          node.targets = [
              tgt for tgt in node.targets if tgt not in to_prune
          ]
          if node.targets:
              return node
          else:
              return ast.Pass()
      return node
  
file_path: catboost/contrib/python/pythran/pythran/optimizations/forward_substitution.py
imports: from pythran.analyses import LazynessAnalysis, UseDefChains, DefUseChains
  from pythran.analyses import Literals, Ancestors, Identifiers, CFG, IsAssigned
  from pythran.passmanager import Transformation
  import pythran.graph
  from collections import defaultdict
  import gast
label_desc: Use image node_id 2 for calling the Remover obj's underlying member method code with example usage: obj.visit_Assign(node) and returns: node, node, ast